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Proceedings Paper

A Method For Testing The Performance Of Image Intensifiers
Author(s): Tamas Sandor; Al Tomer; John C. Klopping
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Paper Abstract

A method is described that can be applied in a clinical environment to measure the linepairs/mm resolution, to test the electro-optical focusing, and to measure a quantity Q proportional to the conversion factor of x-ray image intensifiers. The resolution can be determined and electronically optimized by using a monocular of 7.3-12x power to view the image of a metal test pattern placed at the entrance plane of the intensifier. To determine Q, a photometer is used to measure the brightness of the output screen as a function of input exposure rate. The measured data can be fitted with a straight line, the slope of which is proportional to the conversion factor of the image intensifier. According to the results the precision in the measurements of Q was better than 5%.

Paper Details

Date Published: 25 March 1976
PDF: 4 pages
Proc. SPIE 0070, Application of Optical Instrumentation in Medicine IV, (25 March 1976); doi: 10.1117/12.954588
Show Author Affiliations
Tamas Sandor, Harvard Medical School (United States)
Al Tomer, Harvard Medical School (United States)
John C. Klopping, Harvard Medical School (United States)

Published in SPIE Proceedings Vol. 0070:
Application of Optical Instrumentation in Medicine IV
Joel E. Gray; William R. Hendee, Editor(s)

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